About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing Materials in Energy Environments II
|
Presentation Title |
Additive Manufacturing of Oxide Dispersion Strengthened Steel |
Author(s) |
Austin Whitt, Christopher Kantzos, Aaron Christopher Thompson, Timothy Smith |
On-Site Speaker (Planned) |
Austin Whitt |
Abstract Scope |
Fine oxide particles have been shown to improve resistance to creep and radiation-induced swelling in austenitic and RAFM steels. As a result, oxide dispersion strengthened steels are an attractive option for cladding and structural components in advanced nuclear reactor designs. A method of coating atomized powder to create a nanoscale dispersion of oxide particles in additively manufactured parts has been developed at NASA. This method was applied to 304 and 316 stainless steels to produce yttria-coated powder for additive manufacturing without the difficulties associated with mechanical alloying. Laser powder bed fusion was used to fabricate creep and microstructural samples of oxide dispersion strengthened steel. The impact of added yttria on printability and the resulting dispersion of yttria are characterized. Short-term creep rupture tests show the impact of oxide dispersion strengthening on creep performance. Recrystallization heat treatments are used to study the pinning of grain boundaries by yttria nanoparticles. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Nuclear Materials, Iron and Steel |